Sorry for the late reply. More below..
On 02/24/2016 08:42 PM, David Sterba wrote:
On Fri, Feb 19, 2016 at 09:25:28PM +0800, Anand Jain wrote:
This patch fixes test btrfs/011 which intended to use -r option
but was never used since its associated args 'replace_options'
didn't make it to the cli.
After this patch the tests fails due to extra output. I've tested
several kernels (4.5 rcs), HDD and SSD so it's not caused by my testing
setup.
--- tests/btrfs/011.out 2013-08-29 11:58:37.000000000 +0200
+++ /root/xfstests/results//btrfs/011.out.bad 2016-02-24 12:44:45.562234906 +0100
@@ -1,3 +1,68 @@
QA output created by 011
*** test btrfs replace
+bytenr mismatch, want=20987904, have=0
+Couldn't read chunk root
+bytenr mismatch, want=20987904, have=0
+Couldn't read chunk root
::
+bytenr mismatch, want=20987904, have=0
+Couldn't read chunk root
*** done
Those are 'btrfs fi show' errors on defunct volumes created by
previous test case within btrfs/011 or outside.
An example of reproducing the above error is as below..
---------------------------------------
(a clean start)
# wipefs -a /dev/sd[c-i]
::
(mkfs with 4 devices)
# mkfs.btrfs -f -draid10 -mraid10 /dev/sdc /dev/sdd /dev/sde /dev/sdf
::
# btrfs fi show
Label: none uuid: 55e2335a-6439-43a9-8d42-cb14dd3bb4b5
Total devices 4 FS bytes used 112.00KiB
devid 1 size 4.00GiB used 827.12MiB path /dev/sdc
devid 2 size 4.00GiB used 827.12MiB path /dev/sdd
devid 3 size 4.00GiB used 827.12MiB path /dev/sde
devid 4 size 4.00GiB used 827.12MiB path /dev/sdf
(mkfs with only 3 devices)
# mkfs.btrfs -f /dev/sdc /dev/sdd /dev/sde
::
# btrfs fi show
warning, device 3 is missing
warning, device 2 is missing
warning, device 1 is missing
warning devid 1 not found already
warning devid 2 not found already
warning devid 3 not found already
bytenr mismatch, want=37847040, have=0 <----
Couldn't setup extent tree
bytenr mismatch, want=37863424, have=0
Couldn't setup device tree
Label: none uuid: d57df874-2603-493c-acfc-d200297c9082
Total devices 3 FS bytes used 112.00KiB
devid 1 size 4.00GiB used 1.40GiB path /dev/sdc
devid 2 size 4.00GiB used 417.56MiB path /dev/sdd
devid 3 size 4.00GiB used 1.41GiB path /dev/sde
Label: none uuid: 55e2335a-6439-43a9-8d42-cb14dd3bb4b5
Total devices 4 FS bytes used 112.00KiB
devid 4 size 4.00GiB used 827.12MiB path /dev/sdf
*** Some devices missing
--------------------------------------------
V2 fixes this by starting with a clean set of scratch pool
devices before each sub test case. So that 011.full is clean
as well.
I could reproduce this when I changed the number of scratch
pool devices from 5 to 4. And then the above errors in
011.full can be said to be irrelevant because of a device
which does not belong to scratch pool devices
But, strictly speaking we need to fix 'btrfs fi show' rather.
However I am not too sure why/how those warnings/errors
are useful.
Thanks, Anand
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